Elasticsearch Java method to get the specified field data

ElasticSearch (ES) may be read out via the source interface when a result is required after retrieval. But in this case, the result of the return will be many. When invoking the search method, we can add the AddField or AddFields method, Simply read the required domain. The interface example is as follows:

1         SearchResponse response = Client.preparesearch ("flume-*-content-*")2                 . Setscroll (New TimeValue (60000)3                 . AddField ("ona_sentiment.sna_groups")4                 . Setquery (Constvalue.querybuilder5 (requestsignal)). SetSize (5).                 execute (). Actionget ();

Elasticsearch Java method to get the specified field data